I think if the 2 fight, it would be a close battle. Maybe a draw because Kirby never uses his full power and Sephiroth always gets cocky where he leaves himself open to an attack
Plus, inn smash this time, it depends on the skill of the players and if you think about it, its a counter pick because Kirby is short range while Sephiroth has that massive sword, Masamune. Im pretty sure thats what its called
Random casual on imgflip:Kirby beats sephiroth because Kirby has hammer and can do down B because it has invincibility
Me who is a kirby main and knows kirby's limitations: